22 DEEP-SEA FISHES OF THE ATLANTIC BASIN. 



Selachiis maximus, Stoker, Hist. Fish. Mass., 1867, 253, xxxvii, 3. 

 Cetorhinus Guiuieri, Blanvillk, 1. c. 



Cetorhiiiits lilainviUei, Capello, Joru. Acad. Sci. Lisboa, ii, 233, tig. 1-7. 

 Schiclic roHtrata, Pavesi (younw specimen). 



Body rugose, the .skin very rough, with .siiiiill .spines; lioart small; snout blunt; eyes 

 small; teeth in six or seven rows in eaeh jaw, about two liuiulred iu each row; first dorsal 

 large, triangular, over the s))ace between pectorals and veutrals; second dorsal much smaller, 

 rather larger than anal ; tail large. 



This giant selachian appears to be most abundant in the far north. It is not unusual 

 about the British Lsles, especially around Scotland and tlie Orkneys. Its capture is very 

 unusual in the Mediterranean, but in Norway it is the occasion of a considerable fi.shery 

 on account of its liver. In the northwestern Atlantic it is rare, though sometimes encoun- 

 tered by the Gloucester fishermen, where they capture it for its liver, as is done in Norway. 

 Prof. Verrillhas recorded the occurrence in the summer of 1S7(», at Eastport, Me., of there 

 specimens 25 to 30 feet in length, and one previously taken in 1868, which measured 35 

 feet. Mitehill, writing in 1S14, spoke of its occasional occurrence at Provincetown. Storer 

 mentions a specimen measuring 30 feet 3 inches, harpooned in Pioviacetovvni Harbor in 1839. 



It is unknown elsewhere than in the North Atlantic, and south of the Grand Banks on 

 the west and Scotland on the east may l)e regarded as an estray. To what extent it fre- 

 quents tlie depths is unknown, but since the young have never been seen it is believed to 

 breed in deep water. 



Family CHLAMYDOSELACHID.^, Garman. 



Chlamydoaelaehidw, Garmax, Bull. Essex Institute, xvi, 1884, 8 



Body much elongate, increasing in size very little anteriorly ; head depressed, broad ; 

 eyes lateral, without nictitating mendirane; nasal cavity in skull separate fi-om that of 

 mouth; mouth anterior; snout broad, projecting very little; cusps of teeth resembling 

 teeth of serpents; spiracles small, behind the head; one dorsal, without spine; caudal without 

 pit at its root; opercular flap covering first branchial ai)erture free across the isthmus; 

 intestine with .s^iiral valve. 



CHLAMYDOSELACHUS, Garman. 



Chlamydoselachus, Garman, loc. cit. 

 Chlami/doaelache, GtjNTHER, Challenger Report. 



Branchial apertures six; opercular flap broad, free across the isthnuis; teeth similar in 

 both jaws, with slender subconical cu.sps and broad backward produced bases; no teeth in 

 the middle in front above, a row on the symphysis below; mouth wide, anterior; no labial 

 fold; no nictitating membrane; fins broad, pectorals far in advance of the others; caudal 

 without a notch posteriorly; gill arches slender, long; basihyal not wide; intestine small. 



CHLAJMYDUSELACHUS ANGUINEUS, Garman. (Figure 22.) 



Chlamydoselmhus anguineua, Garman, Bull. Essex Inst., xvi, 1884, 3 (wood out). — Bull. Mus. Comp. Zool., 



vol. XII, No. 1, 188.5, plates. 

 ChlamijdoxfJuche anguinea, Gunther, Challenger Report, xxii, 2, pis. Ixiv-lxv. 



Body very long, slender, eel-like, increasing in size comparatively little anteriorly, com- 

 pressed near and behind the vent, which is in the posterior half of the total length. Head 

 broad, wider than high. Crown slightly convex, forming a rather sharji angle with the 

 snout and sides of the head from the eyes forward. Skull with an anterior foranuMi, begin- 

 ning a short distance in front of a vertical from the front edge of the orbit, resembling that 

 of Jioja. Behind this, juidway between the eyes, there is an elongate depression on the 

 crown as of a second foramen, while on the occij)ut, a little distance in front of the occipital 

 pores, a deep, rounded depression indicates what is commonly called the second, the poste- 

 rior foramen. Snout broad, rounded, hardly extending iu front of the jaws, rather acute 



