214 



PROCEEDINGS OF THE ACADEMY OF 



[June-, 



II. THE TEOTIBRANOHIATA. 



Besides the species discussed below, the following Tectibranchs 

 of the Cephalaspidian group have been reported from the Hawaiian 

 Islands.- Species marked with a * were originally described from 

 the Hawaiian Islands. 



Pwpa nitidula (Lam.).^ 



Bullina scahra (Gmel.). 

 *Bullina vitrea (Pse.). 

 *Scaphafider alatus Dall. 

 *Scaphander pustulosus Dall. 



SmaragdineUa viridis (Q. & G.). 

 *Bullaria peaseana (Pils.).* 

 *Haminea crocata Pse. 

 *Harninea galba Pse. 



*Haminea pusilla Pse. 

 *Haminea sandwichensis Sowb. 

 *Volvatella fragilis Pse. 



Hydatina physis (L.). 



Hydatina a in piastre (L.). 



Micromelo guamensis (Q. & G.), 

 *Aglaja nuttalli Pils. 

 *Philinopsis speciosa Pse. 

 *Philinopsis nigra Pse. 



Bidlaria peaseana has been found abundantly at Hilo by Mr.. 

 Thaanum. The writer took Hydatina amplustre on the north coast 

 of Kahoolawe. 



Umhraculiwi sinicum aurantiacum (Pse.) which Mr. Thaanum 

 has taken at Hilo, appears to be sufficiently distinct from U. sinicum 

 by characters of the shell to merit a subspecific name. 



Pupa thaanumi n. sp. Fig. 1. 



The shell is oblong with acutely conic spire, solid, somewhat 

 shining, whitish, unevenly tessellated with flesh pink, the spotting 

 interrupted by pale bands on the sixth and twelfth spaces between 

 spiral grooves; an apricot buff area at the base. Sculpture of 17 

 spiral grooves on the last, four on the penult whorl; they are closely 

 punctate; the upper two grooves and the lower seven are close, the 

 rest being nearly twice as far apart. Columellar fold heavy, its 

 wide crest grooved. A small spiral fold is above it on the parietal 

 wall. 



Length 9, diam. 4 mm.; 6| whorls. 



Off Honolulu in 6 to 8 fathoms. Type No. 117069, A. N. S. P., 

 from No. 1193a of Mr. Thaanum's collection, taken by D. B. Kuhns, 

 1916. 



This species resembles P. suturalis (Ad.), P. strigosa (Gld.) and 



^ The list is quoted from a MS. catalogue of recorded Hawaiian moUusks 

 compiled by Mr. D. Thaanum. 



^ Solidula nitidula auct., Tornatella nitidula Lam. 

 * Bulla peaseana Pils. Man. Conch. XV, 348. 



