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upturned growth lines; basal margin concave; 
articular furrow broad, shallow; articular ridge 
high, sharp, not overhanging furrow; crests for 
lateral depressor muscles well developed, short, 
usually three in adults. 
Labrum (Fig. 5 F) notched, with three sharp, 
prominent teeth on either side paratype UCMP 
37857, and three on the left and two on the 
right side in holotype UCMP 37855; margin of 
labrum sinuous, a small, prominent convexity 
bordering on either side of notch, followed by a 
broad, shallow concavity in which teeth are 
primarily situated; concavity followed distally 
by broad, low convexity terminating at edge of 
labrum. 
Palpi (Fig. 5 G) with numerous, short, pec- 
tinate spines irregularly arranged along superior 
margins; three or four long, curved, pectinate 
spines situated on inner margin. 
Mandibles (Figs. 5H, I) with five teeth in- 
cluding inferior angle, excepting one mandible 
of holotype UCMP 37855 with only four teeth, 
the second and third appearing fused; first tooth 
largest; second and third teeth approximately 
equal in size; third tooth bifid, terminating in 
point; fourth tooth smaller than preceding teeth, 
bifid, with one or two small, sharp accessory 
denticles above and below; inferior angle trispi- 
nose; uppermost spine of inferior angle broadest, 
lowermost spine longest; row of 10 or 11 long, 
slender spines on inferior margin; spines nearest 
inferior angle usually pectinate curved towards 
inferior angle; anterior and posterior surfaces 
of mandible densely spinose. 
Inner maxillae (Fig. 5/) notched below 
uppermost two large spines; one or two small, 
slender spines in notch; four spines below notch 
followed by two large spines; large spines fol- 
lowed by two or three small spines on inferior 
angle; inferior margin bearing several small, 
slender spines. 
Outer maxillae (Fig. 5 K) oval, bearing a few 
long, slender, distantly spaced spines arranged in 
three parallel rows. 
Rami of cirri I and II densely setose, unequal, 
with outer rami longer; segments slightly pro- 
trudent. 
Rami of cirrus III similar in structure to 
those of cirri I and II, excepting in fewer num- 
ber of spines on segments. 
Cirri IV- VI longer than preceding cirri, with 
four to five pairs of spines per segment; short 
hairs present at base of spines. 
The number of segments on cirri I— III of the 
right side of paratype UCMP 37857 is as follows: 
Cirrus: I II III 
outer ramus: 6 8 9 
inner ramus: 5 7 9 
Penis long, with small tufts of spines scat- 
tered sparingly over surface; tufts common on 
annulations near extremity of penis; extremity 
blunt, covered with thick tuft of long spines; no 
basidorsal point seen. 
TYPE DESIGNATION: Four specimens on gor- 
gonians, holotype UCMP 37855, paratypes UCMP 
37857; one on shell of Sip ho sp. with Verruca 
scrippsae Zullo, sp. nov., paratype UCMP 37856. 
DISCUSSION: Thirteen species of the sub- 
genus Solidob alarms have previously been de- 
scribed from the Western Pacific, eastern At- 
lantic, and Indian oceans. They are: 
Balanus (Solidob alarms) astacophilus Barnard 
(1925:128); Mozambique coast. 
Balanus (So lido balanus) auric oma Hoek 
(1913:199, pi. 18, figs. 20-22; pi. 19, figs. 
1-7); Moluccan Straits (Hoek, 1913; 
Broch, 1931); southeast Australian coast 
(Broch, 1922); Persian Gulf (Nilsson- 
Cantell, 1938). 
Balanus (Solidob alanus) ciliatus Hoek (1913: 
199, figs. 8-16); Flores Sea (Hoek, 1913); 
Sulu Archipelago (Broch, 1931); Siam Bay 
(Nilsson-Cantell, 1934^); Strait of Ma- 
lacca, Indian Ocean (Nilsson-Cantell, 
1934 b)\ Andaman Sea, east coast of India, 
Ceylon, Gulf of Manaar, Arabian Sea, Per- 
sian Gulf (Nilsson-Cantell, 1938); Gulf 
of Aden, Red Sea (Stubbings, 1936). 
Synonym : Balanus maldivensis Borradaile, 
Fig. 5. Balanus nascanus Zullo, sp. nov. Fig. A, Shell of holotype UCMP 37855, X 10- Figs. B—D, Opercu- 
lar valves of paratype UCMP 37856, X 5. Figs. B, C, Scuta. Fig. D, Tergum. Fig. E, Tergum of holotype 
UCMP 37855, X 20. Figs. F, K, Trophi of paratype UCMP 37857, X 45. Figs. G—J, Trophi of holotype 
UCMP 37855, X 45. Fig. F, Labrum. Fig. G, Palpus. Fig. H, Mandible. Fig. 1, Aberrant mandible. Fig. J, Inner 
maxilla. Fig. K, Outer maxilla. 
