100 UNITED STATES NATIONAL MUSEUM BULLETIN 29 6 



eyes and yellow organs could not be determined with confidence. 

 The type-specimen has three males attached to the horny disk, but 

 up to six have been found on one female. Spent males are common, 

 as evidenced by the bare antennules attached to the female. The 

 males do not seem to be attached to the wall of the burrow. 



Relationships: The nearest relative in space and affinities appears 

 to be Cryptophialus minutus Darwin. The major differences are those 

 noted in the diagnosis: the mantle and lateral bar armament, and 

 the- notched mandible. The uniformity of the aperture is demon- 

 strated by three separate and randomly chosen specimens shown in 

 figure 25b-d. The lateral bar teeth are very good characteristics, 

 but the mandible is difficult to see clearly. 



Cryptophialus variabilis Stubbings, 1961, page 189 



Figure 26 



Diagnosis: Cryptophialus with two pairs of long, slender, hairy 

 spines on operculum, lateral bar without a terminal array of teeth. 



Distribution: Calypso Station III, Principe Island, Hots dos 

 Mosteiros, northeast comer of the island, Gulf of Guinea expedition 

 of 1956. In a conglomerate of moUuscan shell, calcareous algae, and 

 the shell of Balanus tintinnabulum tintinnabulum. Thirty-eight speci- 

 mens recovered. I have dissected one specimen presented by H. G. 

 Stubbings through the courtesy of J. Forest of Museum Nationale 

 d'Histoire NatureUe, of Paris. The largest specimen measured by 

 Stubbings was 1.69 mm. 



In addition, five specimens from Acropora digitifera (Dana) from 

 Palawan Island, Philippine Islands, added the following information : 

 Measurements of three specimens which were complete were as 

 follows in length and width in millimeters: 1.35 X 0.85; 1.35 X 0.70; 

 and 1.35 X 0.70. They clearly had features as described below, in- 

 cluding three pairs of terminal cirri, two dorsal body processes, 

 apparently identical mouth parts, and cirral segment count of 14 to 

 24 segments. 



Stubbings describes this species in part as f oUows : 



The mantle aperture bears two pairs of processes of variable length. 

 When fully developed they are long and furnished with a few slender 

 setae, but no teeth [mine did — J. T.]. In undeveloped forms and when 

 damaged they project only slightly above the mantle border. The mantle 

 aperture is armed with stout toothlike spines with serrated edges. The 

 mantle is studded along the ventral margin and the anterior region with 

 trifid, or occasionally more complex teeth. The lateral bar ends abruptly 

 on the left side and here [and] there are a few simple conical teeth in 

 place of the complex spines. On the right side the bar tapers somewhat 

 and there are no conical teeth. There are very minute teeth scattered 

 along both lateral bars. 



